Look, I don’t think Google’s making us stupid. I don’t think Twitter’s the apocalypse. I don’t think Facebook’s ruining human friendship. That said, in my own life I try to make time away from my phone. When I go for a hike, I don’t want to be checking the screen every five minutes. I think especially the literature on day-dreaming and creativity is very persuasive to me. People who day-dream more score much higher on tests of creativity. We know day-dreaming is a very, very valuable mental state. So if you’re always interrupting your day-dreaming, because as soon as you get bored you check your email again, that’s probably not useful. That’s probably not a good thing.
I think about this every time someone complains about FB/Twitter/etc. In small quantities they’re very entertaining. I read those feeds when I first wake up or if I’m waiting in line. Keep it in moderation and no social network will ruin your life.